How would an organism most likely be affected by a DNA mutation?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Which statement describe events that occur during interphase?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?